| Type | Substitutes | Base Diagram |
|---|---|---|
| CL4 | 33E1, OSW3117, TCL4, 9PA35, MCL4, TL413, 13U17_Ultron, 200L4, AV1032, UP35U, UP5 | |
| Web References | CL4 (Philips) @ Franks Electron Tubes? CL4 (Philips) @ Franks Electron Tubes? CL4 (Philips) @ Franks Electron Tubes? CL4 (Philips) @ Franks Electron Tubes? CL4 (Mullard) @ Franks Electron Tubes? CL4 @ Radiomuseum | |